Hot air furnace



June 9, 1931. J. CAMIRE HOT AII'R FURNACE 2 Sheets-Sheet 1 Filed S ept. 12, 1929 June 9,- 1931. CAMIRE 1,809,233

H-QT AIR FURNACE Filed Sept. 12, 1929 2 Sheets-Sheet 2 Patented June 9, 1931 STATES JOSEPH onlvunnor CENTRAL rents, ltI-IODE ISLAND:

nor are FURNACE Application filed September 12,1929; Serial No. l

This invention-relates to improvements in hot air furnaces of the type employed for heating buildings and dwellings.-

The primary object of this invention is to vf provide a device of'the above mentioned character which is adapted to utilizethe burnt gases of the combustion chamber to the most possible extent. r

A further object of this'invention is to provideoa hot air furnace composed of sec- 7 f A still further ob'ect of'this invention is to'provide a device of the above mentioned character adapted to be easily and cheaply constructed and simple and efficient in operation. 1 p

Other objects and advantages of this invention will become apparent during the course of the following description, forming a part of this specification and in which,

Figure 1 is atop plan view of the invention partly in section, showing the simple arrangement of the casing and the fire box chamber;

Figure 2 is a side elevational view of the invention partly in section showing the flue chamber mounted within the hot air casing and upon the fire box chamber;

Figure 8 is a front elevational view of the invention showing'th-e novel arrangement of the fire door and the removable closure for gaining access to the flue chamber;

Figure 41- is a vertical cross-sectional view of the invention showing the general construction of the parts intheir assembled position; and 1 i Figurev 5 is a horizontal cross-sectional View of the same, showing moreclearly the general position of fluechamber relative to' the hot air casing. i

For the purpose of more clearly describing the invention, reference is made to the drawopenin 16 to the interior of the' hot aircasf [18 is formedat thenppermost 'p'ortionof the end wall 7 adapted to be closed by'a closure plate 19,,havin'g an inwardly extending rec- 'from the bottom 8 of the casing 5 the end walls26 of thezfire box 22'is placed ings, wherein. the reference character 5"designa'tes' a metall c casing having side wallsj6 connected by opposite'end walls 'ZLQThe side 1 and f end walls G-and Tareprovided'witha seamen-ea removable cover 9 havinga :downwa'rdly dependingflange 10 on its edges adapted to overlie'the upperedges of the sides and end walls 6 and 7 respectively,

order to form an airtight connection) Elongated openings 11 are provided in" the SldGWEtHSG, of the hot snowing-5 andare furnished with air intake, elbows'k12 havingupwardly extending mouths 18, presenting a horizontal opening 14' to the atmosphere,

either interiorly I or extriorly, 'of the build- Rigidly secured t'o'the covver 9 arehot air pipe connections'15which communicate with -ing5 andare adapted for the attachment of flue pipes leading" to the room "orrooms to be h at d I: 2' o r v; p One of the end walls '6"has an opening 17 at the lower portion thereof while aniopening I tangullariflangel. 20,"engaging the edges of the opening 18. 1 Suitable'handles21are sej'cured to the cover plate 19 for facilitating the 'e1nova1thereoff;

A fire box 22 is'plac'edin the casing'5 and 'constitutes'a box=like structure having a I i bottom 23 and a top 24f spa'ce'djby sidea'nd I 'end ,walls' 25 and 26 respectively, whereby "a combustionchamber" is fonnedabove the erate bars 27, and an ash pit therebelow. upporting legs 28 are secured to-the bottom 23 of this firebox 22- for spacing 'the same One-of in juxtaposition to-th'e opening 17, in the end wall 7 of the casing 5 and is provided with a hinged door 29, hinged to the fire box as at 30. The door 29 is also formed with open- .95 ings 31 closed by a sliding plate 32 operated in the'usual manner and a handle 33 is providedfor opening and closing the door 29.

' The door 29 communicates with the fire chamber of the fire box 22, and is intended for the subjoined claim.

coaling the same, while the ashes are removed through a trough 35, secured to the end wall 7 at the bottom thereof and the trough is open at the top adapted to be closed by a horizontally swinging cover plate 36, hinged to one edge of a shelf 37 as at 38. The trough35 communicates with the interior ofthe fire boxiin alignment with the ash pit thereof whereby easy removal of the ashes may be had.

A flue chamber-r39 is mounted on the fire box top 24, and as shown in the drawings comprises an elongated rectangular boxhav ing a centrally located .baflle plate 40 having an opening 41 at the front endthereof, whereby the flue gasesfromthe firebox 22 may vpass through a neck 42 into one end of the flue chamber 39 and around thebafilei plate 40 by way of the opening 41 wherebythe gases are allowed to pass througha flue pipe 43,-secured tothe :top wall ofthe'flue chamber 39 at the remotest point from the opening s41.

Closures 4 6 are provided for clean out openings :47 intthe front wall I 48 of the Ifiue chamberv and these closures i maybe removed throughathe opening 18 in the front lwall of the casing fil alt 'willbe notedthattheflue pipe '43 passes through an opening .in the cover 9 and forms an airtight connection therewith to v.preventthe escape of hot air from the casing 5. The flue chamber 39$is further-supported ,from the-top of the fire box 24, by spacinglmembers 50. I

It is to be understood that'variouschanges in the shape, size and arrangement of parts maybe resorted to withoutdeparting from the spirit of the invention or the scopeof :I claim: I A hot airheater of the characterdescribed, comprising a sheet-metal hot air casing constituting a portable unit having air inlets at lthe' bottom thereof, and air outlets v-at the uppermost portion thereof, the [box removably: mounted inthe. hot air casing, means for feeding air to the fire box, including an openinginone wall thereofeommunicating -w1thuan opening n the hot a1r cas1ng,- a fiue chambenmounted on the fire box, comprising an elongated box -like structure having an internal bafile ,plate extending centrally in respect thereto, and means for allowing the gases of thefire box to pass through-the flue chamber to casing. p

, Ill-:tGStilI-IODY whereof 'I afiixmysignature.

- JOSEPH lGAMIRE.

the exterioiwofthe hot air 

